Patents by Inventor Miguel N. Azevedo

Miguel N. Azevedo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dual gallery piston
    Patent number: 6651549
    Abstract: A heavy duty diesel piston includes upper and lower portions joined across a friction weld and internally contoured to provide a dual gallery structure including an outer annular gallery and a central gallery joined by passages for communicating cooling oil therebetween. The dual-gallery structure allows oil to enter from the outer gallery, which is formed by the circumferential annular recess in the crown and crown bottom, into the central gallery to cool the piston and particularly the central crown region exposed to hot combustion gases. The friction weld provides high structural integrity and minimizes the number of manufacturing steps needed to attach the crown to the crown bottom.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: November 25, 2003
    Assignee: Federal-Mogul World Wide, Inc.
    Inventors: Xilou Zhu, Alan S. Brown, Walter Joseph Griffiths, Miguel N. Azevedo
  • Dual gallery piston
    Publication number: 20020189442
    Abstract: A heavy duty diesel piston includes upper and lower portions joined across a friction weld and internally contoured to provide a dual gallery structure including an outer annular gallery and a central gallery joined by passages for communicating cooling oil therebetween. The dual-gallery structure allows oil to enter from the outer gallery, which is formed by the circumferential annular recess in the crown and crown bottom, into the central gallery to cool the piston and particularly the central crown region exposed to hot combustion gases. The friction weld provides high structural integrity and minimizes the number of manufacturing steps needed to attach the crown to the crown bottom.
    Type: Application
    Filed: August 12, 2002
    Publication date: December 19, 2002
    Inventors: Xilou Zhu, Alan S. Brown, Walter Joseph Griffiths, Miguel N. Azevedo
  • Dual gallery piston
    Patent number: 6477941
    Abstract: A heavy duty diesel piston includes upper and lower portions joined across a friction weld and internally contoured to provide a dual gallery structure including an outer annular gallery and a central gallery joined by passages for communicating cooling oil therebetween. The dual-gallery structure allows oil to enter from the outer gallery, which is formed by the circumferential annular recess in the crown and crown bottom, into the central gallery to cool the piston and particularly the central crown region exposed to hot combustion gases. The friction weld provides high structural integrity and minimizes the number of manufacturing steps need to attach the crown to the crown bottom.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: November 12, 2002
    Assignee: Federal-Mogul World Wide, Inc.
    Inventors: Xilou Zhu, Alan S. Brown, Walter Joseph Griffiths, Miguel N. Azevedo